In Search of The King

Summary Courtesy of The Unofficial
Captain N Homepage

Kevin, Lana, Simon, and Duke go
to the Mirror World to rescue King Charles, Lana's father. Meanwhile, their
opposites travel into their world. Finally, Mega Man and Kid Icarus bring the
opposites to the Mirror Warp, sending them through - except for Lana's
opposite. Kevin, Simon, Duke, and the King go back to their own world, but Lana
stumbles and is left in the Mirror World. King Charles takes Lana's opposite
back into the Mirror Warp, and Lana goes back to her own world safely. But with
both King Charles and his opposite in the Mirror World, the Mirror Warp is
destroyed, leaving the King trapped in the Mirror World.